Housing for a reverse osmosis water purification unit



FIG. 1 is a perspective view of a housing for a reverse osmosis water purification unit showing my new design;

FIG. 2 is a front elevational view thereof, the rear view being identical thereto;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a left side elevational view thereof; and

FIG. 6 is a right side elevational view thereof. 

The ornamental design for a housing for a reverse osmosis water purification unit, substantially as shown and described. 